<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="content"></div>
    <script>
        function getDate() {
            return '2022-6-15'
        }
        let obj = {
            age: 18
        }
        let str = `
            <div>
                <p>明年的年龄：${obj.age + 1}</p>
                <p>今天是：${getDate()}</p>
            </div>
        `;
        let div = document.querySelector("#content");
        div.innerHTML = str;
    </script>
</body>
</html>